Search found 220 matches

by davidkillingsworth
Wed May 08, 2019 4:15 pm
Forum: Administrators
Topic: [Resolved]DNS cache seems corrupt
Replies: 10
Views: 3561

Re: DNS cache seems corrupt

Wild guess in case you have a cached AAAA NS record present for aetna ...Do you have an ipv6 address on that nic? Does this work any better on the problem machine in failure mode? I double checked and IPV6 was disabled. Though when I did an $ifconfig, it did show a IPv6 address on Eth0. I used thes...
by davidkillingsworth
Wed May 08, 2019 12:28 pm
Forum: Administrators
Topic: My DNS queries were seem refused
Replies: 15
Views: 4836

Re: My DNS queries were seem refused

Have you considered using a resolver other than googles, ones such as 9.9.9.9 and 1.1.1.1 might be worth trying to see if anything changes. Yes, I used my ISP's DNS servers in the configuration instead of Google. I get the same issue. I just want to note that I manage a few other Ubuntu/Zimbra serv...
by davidkillingsworth
Wed May 08, 2019 12:03 pm
Forum: Administrators
Topic: My DNS queries were seem refused
Replies: 15
Views: 4836

Re: My DNS queries were seem refused

Finally, i found that some queries are good, some queries are bad because the firewall block UDP due to a Outbound UDP Flood rule. This rule limit 20 connections/s. I disabled this rule for 24h till now, everything come back like before. SPAM was denied by DNS Blocklist and DCC, Razor + Pyzor score...
by davidkillingsworth
Wed May 08, 2019 11:54 am
Forum: Administrators
Topic: Slow sending emails
Replies: 1
Views: 656

Re: Slow sending emails

Did you ever end up fixing this issue?

If so, how?

Thanks,
David
by davidkillingsworth
Tue May 07, 2019 12:54 pm
Forum: Administrators
Topic: [Resolved]DNS cache seems corrupt
Replies: 10
Views: 3561

[Resolved]DNS cache seems corrupt

Hello, I have a very weird problem that I have just noticed. It all started because mail from a very reputable international insurance company (aetna.com) keeps going into our junk folders for all of our users. At first I was trying to whitelist it, but today I realized that the problem was this. Se...
by davidkillingsworth
Mon May 06, 2019 3:00 pm
Forum: Administrators
Topic: Spam problem
Replies: 6
Views: 2799

Re: Spam problem

#spoofed from header __SPFSENDER_FROM From =~ /\@example\.com|\@example\.net/i meta SPOOFED_FROM (__SPFSENDER_FROM && !DKIM_VALID_AU) score SPOOFED_FROM 7 describe SPOOFED_FROM Not DKIM signed Interesting. We are getting a ton of email pretending to be admin@ouractualdomain.com, which shows...
by davidkillingsworth
Mon May 06, 2019 2:53 pm
Forum: Administrators
Topic: how to whitelist a domain no matter what?
Replies: 6
Views: 6660

Re: how to whitelist a domain no matter what?

Thanks for replying. I literally just got through creating a opt/zimbra/data/spamassassin/localrules/sauser.cf file with the following: whitelist_auth *@agooddomain.com and then zmamavisdctl restart && zmmtactl restart I suspect what is happening is that the /opt/zimbra/conf/postfix_blacklis...
by davidkillingsworth
Mon May 06, 2019 11:04 am
Forum: Administrators
Topic: how to whitelist a domain no matter what?
Replies: 6
Views: 6660

Re: how to whitelist a domain no matter what?

I am having this problem where /opt/zimbra/conf/postfix_blacklist doesn't seem to be working. I have verified that the domain that we want to whitelist is in the file. somegooddomain.com OK It's definitely getting moved to the junk folder for the end user's. This domain is a major partner and it doe...
by davidkillingsworth
Mon Nov 26, 2018 9:55 am
Forum: Zimbra Chat
Topic: Are there and COS settings we can enforce for Zimbra Chat
Replies: 0
Views: 2070

Are there and COS settings we can enforce for Zimbra Chat

We would like to set the display of the Zimbra chat window so that it is always visible on login for the end user.

Is there a way to set this via a class of service setting, or some other method?

Thanks,
David
by davidkillingsworth
Wed Aug 29, 2018 7:31 am
Forum: Administrators
Topic: Is anyone using an anti-spam gateway service?
Replies: 7
Views: 2549

Re: Is anyone using an anti-spam gateway service?

Thanks for all of the responses. I posted something similar to Reddit and got the following responses. ProofPoint Sendio SpamTitan Spambrella Sophos UTM firewalls I thought I would list them here for further discussion and to enlighten anyone else who comes looking for a solid answer and sees this t...

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